| Jurisdiction: | Diocese |
| Maradi | |
| Latin: | Dioecesis Maradensis |
| Country: | Niger |
| Rite: | Latin Rite |
| Cathedral: | Cathedral of Our Lady of Lourdes |
| Area Km2: | 1,000,000 |
| Population: | 6,000,000 |
| Population As Of: | 2004 |
| Catholics: | 1,031 |
| Catholics Percent: | .0 |
The Diocese of Maradi (Latin: Dioecesis Maradensis) is a Roman Catholic diocese located in Maradi in Niger. It is a suffragan in the province which includes the metropolitan archdiocese of Niamey.